Malicious PDF — malware analysis report

Static analysis result for SHA-256 510add50bdaede0f…

MALICIOUS

PDF

73.0 KB Created: 2020-08-17 17:13:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 69bf2552fc78c1825ced202c6dc8c9d0 SHA-1: ec684016f3a472d9e3beef89450e4706a4de7745 SHA-256: 510add50bdaede0f30abdf039232b6cd9c0969c42d86e23a924af44ea8a3565b
120 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.001 User Execution: Malicious Link T1059.001 PowerShell

The PDF file contains a heuristic match for a malicious redirector link, pointing to 'https://ttraff.cc/pify?keyword=binomial+factoring+worksheet'. It also exhibits characteristics of a PDF link farm, embedding numerous external links, many hosted on 'cdn.shopify.com'. The document body, though heavily obfuscated, contains the same malicious URL, suggesting a social engineering attempt to trick users into clicking the link, likely leading to further malware delivery.

Heuristics 3

  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://ttraff.cc/pify?keyword=binomial+factoring+worksheet
    • http://files.paintingsbyashley.com/uploads/1/3/1/8/131871424/lamug.pdf
    • https://cdn.shopify.com/s/files/1/0430/7720/6178/files/tirepexeteponudeguzop.pdf
    • https://cdn.shopify.com/s/files/1/0436/6126/3001/files/persuasive_writing_graphic_organizer_5th_grade.pdf
    • https://cdn.shopify.com/s/files/1/0431/1059/6775/files/35533778308.pdf
    • https://cdn.shopify.com/s/files/1/0431/1715/0357/files/37026133149.pdf
    • https://cdn.shopify.com/s/files/1/0435/1442/9608/files/refobadixu.pdf
    • https://cdn.shopify.com/s/files/1/0434/2428/4824/files/factors_influencing_organizational_buying_behaviour.pdf
    • https://cdn.shopify.com/s/files/1/0429/3541/9039/files/61465236227.pdf
    • https://cdn.shopify.com/s/files/1/0427/4972/2790/files/zijavirase.pdf
    • https://cdn.shopify.com/s/files/1/0446/5645/9939/files/catalogo_price_shoes_escolar_2020.pdf
    • https://cdn.shopify.com/s/files/1/0430/9850/5369/files/pijisodav.pdf
    • https://cdn.shopify.com/s/files/1/0435/6472/8479/files/paulk_workbench_plans_free.pdf
    • https://cdn.shopify.com/s/files/1/0434/7356/7901/files/pch_games_online_eggz.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e18c.bin
ee33bea619300917fe3ced0f4b2cf08ab293434a25ea135317b0c1a5c2cfa180		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE18C 5500 bytes
font_01_sfnt_off0000f421.bin
3ed566686f3c69284706a0f213018233cb4863f125431c8805e8d8df8a2d38cb		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF421 10160 bytes

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